Really?

So, you know the people that stand outside the grocery store taking signatures for their petitions? My mom recently informed me that they are paid per signature--interesting, eh? Well, my interaction with one such man today went a little something like this:

Him: Hi ma'm, are you a voter?

Me: Not here.

Him: Damn.

(A slight pause as I walk toward the store entrance.)

Him: Well, are you married?

Me: No.

Him: Hooked up?

Me: (Giggle) I am very much spoken for.

Him: Damn.

(I walk in the store, complete my purchase, and am on my way back to my car.)

Him: Well, I'll catch you on the rebound.

Not so appropriate, strange man who is two decades older than me. Thanks for shopping.

How would you have responded?